Plasmonic biosensing with nanoimprint binary grating using ellipsometry

Rakesh Singh Moirangthem; Mohammad Tariq Yaseen; Yia-Chung Chang; Pei-Kuen Wei

doi:10.1117/12.892868

12 September 2011 Plasmonic biosensing with nanoimprint binary grating using ellipsometry

Rakesh Singh Moirangthem, Mohammad Tariq Yaseen, Yia-Chung Chang, Pei-Kuen Wei

Proceedings Volume 8099, Biosensing and Nanomedicine IV; 80990P (2011) https://doi.org/10.1117/12.892868
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

An optical label free and high sensitivity plasmonic biosensor using nanoimprint metallic binary grating is presented based on the phase information of the ellipsometry signal. Plasmonic binary grating was prepared by using soft nanoimprinting technique which significantly reduce the fabrication cost and can be realized for a transition from a laboratory-scale method to full-scale technology. The bulk sensitivity measurement from this 1D binary metallic grating gives a value of refractive index resolution of 1.06×10^-7 RIU. Such a highly sensitive plasmonic biochip was used to investigate the adsorption of bio-molecules on the nanostructure surface in dynamic mode by monitoring the change in polarization state or phase of reflected light in the ellipsometry measurement as a sensing signal.

Citation Download Citation

Rakesh Singh Moirangthem, Mohammad Tariq Yaseen, Yia-Chung Chang, and Pei-Kuen Wei "Plasmonic biosensing with nanoimprint binary grating using ellipsometry", Proc. SPIE 8099, Biosensing and Nanomedicine IV, 80990P (12 September 2011); https://doi.org/10.1117/12.892868

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